Just to clarify, like Dirkclod and sdtrojan, I fly BVR (beyond *my* visual range) but still within direct LOS of the equipment. I also agree that: 1) I trust my gear to go well beyond my visual limits (thank you FPV); 2) I know when to turn around, and scratchy video is a pretty good sign it's time; multiple recoverable fail-safes being the other obvious clue you're pushing your luck. Also, at turnaround, I don't automatically do a full 180. I yaw slowly, and if scratchy video turns into a full blizzard, I return to previous outbound orientation and fly home backward for 500-1000 meters until I can yaw around with full FPV confidence.
Kelly